719/9C
Miniature Angular Contact Ball Bearings
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719/9C Bearing Product Overview & Core Advantages
The 719/9C is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high-speed performance. As a single-row bearing with a 15° contact angle, it excels at supporting combined loads—simultaneously handling significant radial loads and axial loads in one direction. Its compact design, featuring a 9 mm bore and 6 mm width, makes it ideal for space-constrained, high-precision machinery. Available in both open and sealed variants, and with options for preload and universal matching (SU), it offers design flexibility for demanding applications.
719/9C Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 719 | Series designation for a high-precision, small-bore angular contact ball bearing. |
| 9 | Bore diameter code (9 mm). |
| C | Denotes a 15° contact angle, optimized for high-speed operation. |
Note: The provided specification indicates optional features such as sealing and preload, which would be designated by additional suffixes (e.g., -2RS for rubber seals) not shown in the base 719/9C code.
719/9C Bearing Structural Features & Performance Benefits
- High-Speed Capability: The 15° contact angle and options for lightweight nylon or phenolic cages minimize centrifugal forces and friction, enabling extremely high limiting speeds (up to 58,000 rpm with grease, 62,000 rpm with oil).
- Superior Precision: Manufactured to ABEC P5/P4 (ABEC-5/ABEC-20) tolerance classes, this bearing ensures minimal runout and vibration for applications demanding the highest levels of rotational accuracy.
- Robust Load Capacity: The optimized internal geometry and high-grade steel or ceramic balls provide a dynamic load rating of 562 lbf and a static load rating of 247.28 lbf, offering reliable performance under combined radial and axial loads.
- Configuration Flexibility: The Universal Matchable (SU) designation means single bearings can be mounted in pairs (back-to-back, face-to-face, or tandem) to adjust rigidity and moment load capacity without the need for selective assembly.
- Application-Tailored Lubrication: The bearing comes pre-lubricated, and the availability of sealed versions ensures lubricant retention and protection from contaminants, extending service life.
719/9C Bearing Typical Application Areas
- High-Speed Spindles for CNC machining centers, routers, and grinders
- Precision Instrumentation and medical devices
- High-frequency Electric Motors and turbo-molecular pumps
- Aerospace auxiliary systems and guidance mechanisms
- Robotic arm joints and high-precision gearboxes
